In the one into which Peter unsuspectingly sank the springs were broken, and he hit the backs of his knees against the wooden frame.
彼特
经意
坐下去，那椅子
下就断了，他膝背竟打在椅子木框架上。
知
;知觉;;,欢欣;经心;;;;
过去式和过去分词;;In the one into which Peter unsuspectingly sank the springs were broken, and he hit the backs of his knees against the wooden frame.
彼特经意坐下去，那椅子下就断了，他膝背竟打在椅子木框架上。
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